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Re: [TowerTalk] Operating RCS-4

Subject: Re: [TowerTalk] Operating RCS-4
From: Jim Lux <>
Date: Mon, 13 Mar 2006 21:25:37 -0800
List-post: <>
At 06:39 PM 3/13/2006, wrote:
>In a message dated 3/13/2006 6:46:44 PM Eastern Standard Time,
> writes:
> > If you're talking about the 4 way switch, it uses the scheme of positive
> > half cycles of AC to actuate one relay and negative half cycles for the
> > other relay(s), so it definitely won't work with 12VDC supply.
>Sure you can, just swap the plus and minus DC leads - reversing the polarity.

No.. you need both half cycles.  If you use DC only, you get 3 states 
+,0,-... If you use AC, you get all 4 possible states: 0, +, -, and +/-


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